Machine for doubling tin plates or sheets



Sept. 8, 1925. 1,553,032

G. M. DAvlEs ET AL MACHINE FOR DOUBLINGTIN PLATES 0R SHEETS Filed Aug. '7, 1922 3 Sheets-Sheet 1 I .Il

XY EF* Sept 8, 1925. 1,553,032-

G. M. DAvu-:s ET Al.

MACHINE FOR DOUBLNG TN PLATES OR SHEETS Filed Aug. v, 1922 s sheets-sheet 2 Sept. 8, l 925.

G. .M. DAVIES ET AL MACHINE FOR'DOUBLING TIN PLATES OR SHEETS 7, 1922 3 Sheets-Sheet 5 Filed Aug.

soA

Patented Sept. 8, 1925.

.UNITED STATES PATENT OFFICE.

GEORGE MORGAN DAVIES, WILLIAM DVIES, .AND FREDERICK FOX EDWARDS, 0F

` LLANELLY, WALES.

Application flied August 7, 1922. serial No. 580,195.

To all who/nt t may con-cern.'

Be it known that we, Gnoncu MORGAN Davies, VTLLIAM Davies, and FREDERICK Fox EDWARDS, subjects of the King of Great Britain and Ireland, and residents of Llanelly, county of Carmarthen, Wales, have invented a certain new and useful Improven'ient in a Machine for Doubling Tin Plates or Sheets, of which the following 1s a specification.

This invention has :for its object the vprovision of a simple and efficient machine for doubling, folding, squeezing, and pressing `plates in sheet, steel, tin-plate and similar factories where sheets and plates require doubling, squeezing, pressing and bending with a minimum amount of manual labour. In order that the invention may be -readily understood, referenceis to be had to `the following description and accompanying sheets of drawings, wherein z- Figure l is a plan view of a machine constructed in accordance with the invention.

Fig. 2 is a left hand side view of said machine. Y l

Fig. 3 is a right hand side viewthereof.

Fig. 4 is a longitudinal sect-ional lview tliereof,fparts being shown in inoperative position.- y l Fig. 5 is' a similar view but showing the parts inoperative position.`

Fig.` 6 is a vertical sectional view of the left hand adjustable gage dra-,wn to an enlarged" scale.

Fig. 7 is a vertical sectional view of the right hand gage, also drawn to an enlarged scale. Y

Like letters of reference indicate corresponding parts in thel several figures.

'In carrying out the invention, themachine consists of a substantially horizontal table topfcarried'by a suitable standard or frame a, said table top comprising a fixed and stationary portion a and a movable portion e2 hingedly connected tothe fixed portion a, said movable portion .abeing connected to the fixed portion a. by means of spring-controlled rising and falling hinges a3, the machine being so positioned that the table top thereof is` level with the flooring plates of thetin or other mill, thus venabling the roller-man tog throw the sheet coming frornthe rolls on to the table, the ,shears b of the `machine being arranged .towards the off `side .ofy said machine, as

shown in Figs. l to /tof the accompanying drawings.

The movable part 'cu2 of the table top, i. e. the doubler, (commonly termed squeezer is connected to a reciprocatory crank shaft c carried inbearings c in the frame a by means of a pair of arms 02 carried by said shaft c, said arms 02 attheir upper end being pivotally connected to the underside of the squeezer a? by means of a pair of links c3, whilst the lower ends of said arms c2 are pivotally connected to a U-shaped member or frame Z pivotally connected to a pair of links CZ carried by a `transversely disposed shaft cl2 roekably mounted in the machine frame (t, said frame ormember (l being by, its front end connected `bv a rod or the like Z3 with the mill rolls, whilst at the rear end of the machine` there is provided a foot lever e, which is connected up by a baror the like c with the cup orvfriction crab of the rolls for Iputting the m`achine inaction, said foot lever e being carried by a transversely disposed shaft e2 mounted in the frame a ofthe machine.

The crank shaft'l o, which crank shaft c extends beyond the off side of the machine,

is connected by crank f and connecting link f with the depending arms b2 of the movableshear bla-de saidy movable` shear` b `being pivotally mounted on the frame a,

whilst the other blade b is fixedly secured thereto.

`On the shear or off side of` the machine, and near to the joining of the table parts a, ci?, there is arranged a spring-controlled plunger, indicated as a whole by reference letter g, said plunger or side gage, shown on an enlarged scale in Fig. 7, being connected by rods or the like` grtoan horizontally dis` posed bar gg'whose other end g3 is pivotally connected to the frame c, Figs. l, 4 and 5.

On the other side of the table and in line with the gage g `and transversely of t-he table top there is arranged a second side gage, in-l dicated as a `whole by reference letter L, said gage 7L being depressible into the table top and also adjustableto suit the width of the sheet to be doubled. Y y

This side gage consists, as shown in Fig. `6, of a box-like frame 7L slidably mounted inguideway It* in the table top, said box being provided interiorly with a spring-controlled `finger h2 slidable through rearwardly extending curved plates h3 which are xedly carried by a vertically disposed spring-controlled and slotted rod L slidable in said box frame L, said curved plates hr* bearing each on a cam surface LF on each side of the linger or arm. 7i? which is* adapted to be protruded upwardly through a slot ai* in the table top to engage a side of a sheet, whilst at the rear end of the table top vthere is arranged a third gage z' which is adjustable or shiftable longitudinally of the table top by the doubler-man to suit the length of the sheet to be doubled.

In order to shift the gage 7i t ansverse-ly, ther box frame z.l is on its underside provided with a threaded boss zP in which engages a handled screw LT rotatably mounted in a bracket its ixedly secured to the near side of the machine, movement of said gage /z being according as the screw is rotated.

In practice, the roller-man throws a sheet on to the table top, the doubler-man then `places said sheet indicated by dot-and-dash lines y' in Fig. l and by full lines j in Figs. a and 5, against the gages g and z' and then depresses the foot lever e. lThis depression of thefoot lever e causes, through a system of pivotally mounted levers lr, connected with the lrocker sha-ft e2 thereof, the Y rock ing'of a bell crank lever 7c carried by a transversely disposed shaft 7a2, the rocking of said lever 7c lifting by its connecting bar the free end of a `lever k3 pivotally rmounted on the lower endof the slotted casing It, in which is slidable the spring-controlled rod f, Figs. 4;, 5 and 6. This lever 7c3 car- -ries an yinclined extension or plate 7c* which bears against an inclined extension or plate Im'. carried by a lever m pivotally mounted 'on the casing hg, and through said lever m freely extends the end of a rod m2 which carries a spring-controlled pawl m3 pivotally mounted on an arm IL10 on the lower part of the rod It* said arm, hilo extending through the slot-of the casing h", said pawl m3 engaging'in ratchet teeth fm4 on the casing It.

lVith the above arrangement 'there obtains, on the lifting of the lever /c3,the outward movement of the lever mand consequently the disengagement of the pawl m3 from the ratchet teeth m4, whereupon the rod t, under the action of its spring, rises and allows the finger l1?, under the action of itsY spring` to move forward and upward and by its L-shaped end hi, engage the side of the plate y', as in Fig. G, said platefj being thus securelyheld in positionibetween the gages g, t and i.

At the same time as the above takes place, the movement of the rod or bar c, by the depression of the foot lever e, puts in action the cup or friction crab, making wo-rking connection through the rod (Z3 between the mill rolls or other power and the' swinging frame d, causing said frame d to rock and with it the arms c2 and through thelinks c connected to said arms c and the squeezer to swing. the same. upwards and ove-r, doubling the sheet upon itself as the squeezer lattens the sheet, the springcontrolled hinges o3 allowing the hinged end whilst the downward movement of the rod L, through the curved plates hr3 thereof acting on the cam surfaces h5 `of the finger 7b2, forces said finger k2 backwards against the action of the spring thereof, drawing said finger 7i? outof engagement with the plate ,7' till the gage is flush with the table top, whereupon the gage is locked in its lowest position by reason of the spring-controlled pawl m5i engaging in the lowermost of the ratchet teeth m4.

At 4the same time a wiper c fiXedly mounted on the crank shaft c' pushes outwards the pivotally mounted bar g2 and with it the rods g drawing back the plunger gage g against the action of its spring, thus freeing the other side. of the plate y', enabling said sheet to be moved. y'

The doubler-man then turns thefsheet to bring, in turn, the raw, but not the folded, edges to between the shears o, o and again depresses the foot lever e, causing the crank shaft c to' rock again and the shear blade b, through the intermediary of the crank f and connecting` link f', yto move down, making the cut`rv the squeezer a? making an idle stroke while shearing is taking place, said second depression releasing the side gages which return to normal position ready to receive another sheet, and so'on with each succeeding sheet;`

lVith a machine as above set forth there obtains the great advantage that the loss of sheets through overheating is obviated, inasmuch as sheets which arecomparatively cool can easily be doubled without impairing the surface, quality and quantity of sheets. Further, the machine is only in operation as and when required, vwhereas the present day machines are constantly in motion, valthough not performing al doubling or a shear, that is to say, there is no sheet in the machine, thus effecting a great saving in wear and tear of said machine.

le claim kl. A tin-plate or sheet doubling machine, characterized by a frame, a horizontally disposed two-part table top thereto, constituted by a stationary part and a movable part or squeezer, spring-controlled rising and falling hinges to sait squeezer, a rocking shaft with arms thereto located beneath the table top, a swinging frame pivotally connected to the lower ends of said arms, links pivotally connected to the upper ends of said arms and to the underside of the squeezer, a rod connecting the swinging frame up with a source of power, pedalactuated means for setting in action said source of power, a spring-controlled ofiside plunger or gage and means for actuating the same, a spring-controlled depressible and adjustable near-side gage and means for actuating the same, and a longitudinally adjustable end gage, as herein described, to receive the plate or sheet to be doubled.

2. A tin-plate or sheet doubling machine, characterized by a frame, a horizontally disposed two-part table top thereto, constituted by a stationary part and a movable part or squeezer, spring-controlled rising and falling hinges to said squeezer, a rocking shaft with arms thereto located beneath the table top, a swinging frame pivotally connected to the lower ends of said arms, links pivot ally connected to the upper ends of said arms and to the underside of the squeezer, a rod connecting the swinging frame up with the source of power, pedal-actuated means for setting in action said source of power, a spring-controlled off-side plunger or gage and means actuating the same, a spring-controlled depressible and adjustable near-side gage and means for actuating the same, a longitudinally adjustable end gage,

able part, a swinging frame located beneath y said' table top and operatively connected with the movable part thereof, means connecting the swinging frame with a source of power, a spring-controlled oif-side gage, means for actuating the same, `a spring-controlled near-side gage, means for actuating the same, and a longitudinally adjustable end gage.

4. A tin-plate doubling machine comprising a table top including a fixed section and a movable section, spring-controlled rising and falling hinges carrying said movable section, a swinging frame operatively connected with the moving section, gripping means adjacent said hinges for engaging a plate positioned on said table top, and means for simultaneously controlling the operation of said swinging frame and gripping means.

In testimony whereof we have aixed our signatures hereto this nineteenth day of May 1922.

GEORGE MORGAN DAVIES. VILLIAM DAVIES. FREDERICK FOX EDWARDS. 

